WO2012174916A1

WO2012174916A1 - Interference suppression method and device in situation of spectrum sharing between different systems

Info

Publication number: WO2012174916A1
Application number: PCT/CN2012/073139
Authority: WO
Inventors: 蒋成钢; 李媛媛; 白文岭; 杨宇
Original assignee: 电信科学技术研究院
Priority date: 2011-06-22
Filing date: 2012-03-27
Publication date: 2012-12-27
Also published as: CN102843697A; CN102843697B

Abstract

Disclosed are an interference suppression method and device in situation of spectrum sharing between different systems. By means of technical solutions in embodiments of the present invention, a terminal device meeting a preset rule is scheduled to work at a cognitive frequency band, and the other terminal devices are schedules to work at an authorized frequency band, thereby effectively reducing interference between two systems when a cognitive system and an authorized system share the spectrum, comprising interference of the authorized system to a downlink of the cognitive system and interference of the cognitive system to an uplink of the authorized system, and meanwhile effectively ensuring normal and stable working of the cognitive system at the cognitive frequency band. Therefore, the cognitive system uses idle spectrum resources of the authorized system with no/low interference, thereby improving the utilization of the spectrum and improving the link quality.

Description

Interference suppression method and device in the case of sharing between different systems of frequency sharing This application claims to be submitted to the Chinese Patent Office on June 22, 2011, the application number is 201110169379.5, and the invention name is "interference suppression method in the case of spectrum sharing between different systems" The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference. Technical field

The present invention relates to the field of communications technologies, and in particular, to an interference suppression method and apparatus in the case of spectrum sharing between different systems. Background technique

With the rapid development of the mobile communication industry, the contradiction between the increasing demand for broadband wireless communication and limited spectrum resources is becoming more and more obvious, although OFDM (Ortho Term Evolution) has adopted OFDM (Orthogonal Frequency Division Multiplexing). Multiplexing technology, MIMO (Multi-Input Multiple-Out-put) technology to improve spectrum utilization, but these can not solve the problem of limited spectrum resources.

The spectrum usage of different wireless access systems in the IMT (International Mobile Telecommunication, International Mobile Telecommunications) band varies with time and geography, such as TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) Covering the outdoor area, TD-LTE (Time Division-Long Term Evolution) provides coverage of hotspots, such as office buildings. During business hours, most of the staff are concentrated in office buildings, and TD-LTE is heavily loaded. During off-duty or holidays, people are dispersed outdoors, and TD-SCDMA is heavily loaded. With the development of network construction and mobile communication technologies, operators are also moving from 2G (2nd Generation, 2nd Generation Mobile Communication System) network to 3G (3rd). Generation, third-generation mobile communication systems), and even 4G (4th Generation, fourth-generation mobile communication systems) network evolution. In the initial stage of operation, the new network tends to have fewer users, and the network load is light, and the spectrum is small. Idle, while the old network is heavily loaded and the spectrum is tight. When the new network matures, the user gradually shifts to the new network, causing the old network spectrum to be idle and the new network spectrum to be tight.

On the one hand, spectrum resources suitable for cellular communication are becoming more and more scarce. On the other hand, users are increasingly demanding data transmission, and unlimited spectrum is added to the over-loaded RAT (Radio Access Technology). Expanding network capacity is an unrealistic issue. The flexible sharing of spectrum through cognitive radio technology makes full use of idle spectrum, which can greatly alleviate the pressure on operators' spectrum resources. For example, in the IMT band, two multi-carrier wireless access systems, IMT-2000 and IMT-Advanced, use cognitive radio technology, as shown in the application scenario shown in Figure 1, the two access networks can use each other's The idle carrier can greatly improve the spectrum utilization efficiency, meet the operator's demand for spectrum resources, and alleviate the shortage of spectrum resources.

Since different RATs can obtain mutual spectrum usage information through information interaction, especially for RATs within a single operator, such information interaction is easier to implement, and dynamic adjustment of spectrum resources is easier. To achieve spectrum sharing of different RATs, the central control node can be used to centrally manage the spectrum usage of RATs in the network. The function of cognitive radio is completed in the network through a central control entity JSM (Joint Spectrum Management), as shown in Figure 2.

The JSM can collect the idle spectrum information of each RAT, and generate relevant decisions about the available idle frequency bands according to the network configuration information and the spectrum policy, and can provide the idle frequency band as the "cognitive frequency band" to other RATs according to the spectrum requirements of other RATs or Reclaim the "cognitive band". The authorized RAT has the highest priority for the "cognitive band", the other RAT acts as the cognitive RAT in the "cognitive band"; when the authorized RAT requires the recovery of the "cognitive band", the JSM adjustment works on the "cognitive band" The cognitive RAT continues to work on other idle spectrum and returns the "cognitive band" to the authorized RAT. The network configuration information includes information such as the location of each RAT base station, the configured carrier information, and the like, and the network configuration information can be updated according to the change of the network device/parameter.

In the mobile communication system, the system throughput is maximized by packet scheduling, and the fairness of users is ensured as much as possible to ensure the service quality requirements of different service flows. The scheduling method includes: Round-robin algorithm, maximum carrier-to-interference ratio algorithm, proportional fair algorithm. The round-robin algorithm loops each user, that is, from the scheduling probability, each user occupies the service resources (time slots, code channels, power, etc.) with the same probability. The maximum carrier-to-interference ratio algorithm selects only the user with the highest carrier-to-interference ratio, that is, the user with the best channel condition occupies the resource transmission data. When the user channel is degraded, the user with the best channel is selected. The proportional fair algorithm is based on maintaining the user's long-term transmission of data throughput is fairly fair, while considering the use of short-term channel changes to increase transmission efficiency.

In the process of implementing the embodiments of the present invention, the Applicant has found that the prior art has at least the following problems:

The spectrum sharing is implemented in the communication network. When the spectrum of the target cell of the authorized system is idle, the idle spectrum can be used as a cognitive frequency band by other systems in the local area, and the system working on the cognitive frequency band is regarded as a cognitive system due to authorization. The frequency band in the neighboring cell of the target cell of the system may not be in an idle state, and the cognitive system of the cognitive band may interfere with the neighboring cell of the target cell of the authorized system, thereby reducing the link quality and network capacity of the authorized system.

Summary of the invention

The embodiments of the present invention provide an interference suppression method and device in the case of spectrum sharing between different systems, which solves the problem of mutual interference between the cognitive system and the authorization system in the prior art.

To achieve the above objective, an embodiment of the present invention provides an interference suppression method in the case of spectrum sharing between different systems, including:

The base station of the cognitive cell selects a terminal device that meets the preset condition among the terminal devices served by the base station;

The base station of the cognitive cell schedules the terminal device that meets the preset condition to work on the cognitive frequency band, and schedules other terminal devices to work on the licensed frequency band.

On the other hand, the embodiment of the present invention further provides a base station, which is a base station service corresponding to the cognitive cell, and includes at least:

a setting module for setting a selection condition; a selection module, configured to select, in each terminal device served by the base station, a terminal device that meets a selection condition set by the setting module;

The scheduling module schedules the terminal device selected by the selection module to work on the cognitive frequency band, and schedules other terminal devices to work on the licensed frequency band.

Compared with the prior art, the technical solution proposed by the embodiment of the present invention has the following advantages:

By applying the technical solution of the embodiment of the present invention, the terminal device that meets the preset rule is scheduled to work on the cognitive frequency band, and the other terminal devices are scheduled to work on the licensed frequency band, thereby effectively reducing the cognitive system and the authorization system. In the case of shared spectrum sharing, the interference between the two systems includes the interference of the authorized system on the downlink of the cognitive system, the interference of the cognitive system to the uplink of the authorized system, and at the same time, it can effectively protect the cognitive The normal and stable operation of the cognitive system of the band. Therefore, the cognitive system can use the idle spectrum resources of the authorized system without interference/low interference, improve the utilization efficiency of the spectrum, and improve the link quality. DRAWINGS

1 is a schematic diagram of an application scenario of a different system idle carrier sharing in the prior art; FIG. 2 is a schematic diagram of application of a central control entity (JSM) in the prior art; FIG. 3 is a schematic diagram of a different system according to an embodiment of the present invention; Schematic diagram of the interference suppression method in the case of spectrum sharing;

FIG. 4 is a schematic diagram of an application scenario of an interference suppression method in the case of spectrum sharing between different systems according to an embodiment of the present invention; FIG.

FIG. 5 is a schematic flowchart of an interference suppression method in a case of sharing spectrum between different systems in a specific application scenario according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.

detailed description

As described in the background art, with the rapid development of mobile communication services, telecom operators will Faced with a shortage of spectrum resources. However, the spectrum usage of different RATs in the wireless communication band changes with time and region, which results in certain RATs spectrum requirements in some areas at certain times, while some RATs in the same area are relatively idle.

The fixed spectrum allocation policy is not likely to change in the short term. The cognitive radio technology can realize the sharing of spectrum between RATs and improve the utilization of spectrum.

The first principle of cognitive radio is the protection of the authorization system, that is, the cognitive radio needs to use the idle spectrum resources without interfering with the authorization system on the idle spectrum, and the authorization system includes the authorization system of the idle spectrum area and the adjacent area of the idle spectrum. Authorization system, therefore, the technical solution proposed by the embodiment of the present invention aims to make full use of the spectrum resources of the authorization system of the idle spectrum area while reducing the interference to the authorization system of the adjacent area.

Based on the above ideas, the technical solution proposed by the embodiment of the present invention considers that the cognitive system needs to protect the normal operation of the band authorization system. Therefore, the cognitive system needs to ensure that the interference to the authorization system is within the tolerance range. On the other hand, the basics and terminal equipment operating in the cognitive frequency band may be interfered by the authorized system, and thus the communication quality is reduced. Moreover, as the state of the idle spectrum changes, frequency switching may occur at any time, resulting in user delay. increase.

Correspondingly, the embodiment of the present invention proposes an interference suppression method in the case of inter-system spectrum sharing in the case of inter-system spectrum sharing, and solves the above-mentioned authorization system and cognitive system due to spectrum sharing by cognitive radio technology. Interference suppression problem. By scheduling the terminal devices in the cognitive frequency band of the cognitive system, the uplink/downlink interference between different systems due to spectrum sharing is reduced, and the terminal devices and services in the cognitive band can be guaranteed to work normally.

In practical applications, the technical solution proposed in the embodiments of the present invention may also be applied to other wireless communication systems with authorized/unauthorized (cognitive), primary/secondary, or priority spectrum sharing, and the specific application scenarios are changed. It does not affect the scope of protection of the present invention.

As shown in FIG. 3, it is a schematic flowchart of an interference suppression method in the case of spectrum sharing between different systems according to an embodiment of the present invention. The method specifically includes the following steps:

Step S301: The base station of the cognitive cell selects a terminal device that meets a preset condition among each terminal device served by the base station. In order to make the corresponding selection, before the execution of this step, the following two aspects of information acquisition processing are required:

(1) Distance information.

The base station of the cognitive cell acquires the path loss information of each terminal device served by itself, and determines the distance between itself and each terminal device according to the path loss information.

In an actual application scenario, the distance from the base station may be used as a reference value for the terminal device to be interfered by the neighboring cell (authorized cell), and the closer to the base station of the cognitive cell, the corresponding base station and terminal device of the neighboring cell. The smaller the interference.

(2) C/I (Carrier/Interference, carrier power/interference total power, ie carrier-to-interference ratio or interference protection ratio) information.

The base station of the cognitive cell acquires the uplink and/or downlink C/I corresponding to each terminal device served by itself.

The C/I information is a direct measurement parameter of the interference state. The smaller the C/I value, the stronger the interference of the terminal equipment to the neighboring cell (authorized cell).

Through the acquisition of one or both of the above information, the base station of the cognitive cell can determine the interference situation of the neighboring cell (authorized cell) received by the terminal device served by itself.

In the actual application scenario, whether the above information or the two types of information are obtained, and which information is specifically obtained may be selected according to actual needs, and such changes do not affect the scope of protection of the present invention.

Further, according to the difference in the type of information acquired, the selection process of the terminal device corresponding to the preset condition may also be different. Hereinafter, the specific selection process is described in two cases for different information types:

Case 1: The situation of obtaining distance information.

In this case, the process of step S301 is specifically that the base station of the cognitive cell selects the terminal device that meets the distance condition in each terminal device served by the base station according to the determined distance between itself and each terminal device. The terminal equipment of the preset condition, according to the content difference of the distance condition, the corresponding processing procedure is specifically:

(1) The base station of the cognitive cell selects the nearest base station of the cognitive cell among the terminal devices served by itself according to the determined distance between itself and each terminal device. The preset number of terminal devices are terminal devices that meet preset conditions.

This strategy is mainly based on the selection of a fixed number of terminal devices from the million information, and is based on the number-based selection process.

(2) The base station of the cognitive cell selects the distance between itself and each terminal device according to the determined distance between itself and each terminal device, and the distance between the base station and the terminal device is mainly based on the distance information. The selection of the terminal device in the specified range is based on the distance range selection process.

Case 2, get C /! Information situation.

In this case, the process of step S301 is specifically that the base station of the cognitive cell selects the terminal device that meets the C/I condition as the compliance pre-selection among the terminal devices served by the base station according to the acquired uplink or downlink C/I. The conditional terminal equipment, according to the content difference of the C/I condition, the corresponding processing procedure is specifically:

(1) The base station of the cognitive cell selects the preset number of terminal devices with the highest C/I value corresponding to the preset condition in each terminal device served by the base station according to the obtained uplink or downlink C/I. Terminal equipment.

This strategy is mainly based on C/I information for a fixed number of terminal equipment selection, based on the number-based selection process.

(2) The base station of the cognitive cell selects, according to the acquired uplink or downlink C/I, all the terminal devices whose corresponding C/I value is greater than the preset C/I value in each terminal device served by the base station. Terminal equipment with preset conditions.

This strategy mainly selects the terminal equipment of the specified range based on the C/I information, and is a selection process based on the C/I value range.

It should be further pointed out that after the selection of the terminal device is completed according to the above rules in step S301, especially for (2) in the above case 1 and (2) in the second case, the terminal device is based on the specified range. The process of selecting, if the base station of the cognitive cell does not select at least one terminal device that meets the preset condition in each terminal device served by itself (ie, the terminal device that the base station does not serve within the specified range), the cognitive cell The base station abandoned the use of the cognitive carrier. Step S302: The base station of the cognitive cell schedules the terminal device that meets the preset condition to work on the cognitive frequency band, and schedules other terminal devices to work on the licensed frequency band.

In an actual application scenario, this step may further perform screening according to QoS whether to schedule the cognitive frequency band, including:

The base station of the cognitive cell determines whether the corresponding terminal device meets the scheduling requirement according to the QoS (Quality of Service) level of the service corresponding to each terminal device in the selected terminal device that meets the preset condition.

The base station of the cognitive cell schedules the terminal device that meets the scheduling requirement to work on the cognitive frequency band, and schedules the remaining terminal devices that do not meet the scheduling requirements and other terminal devices that do not meet the preset conditions to work on the licensed frequency band.

Such further screening is mainly based on the QoS requirements of the service corresponding to the terminal device. Only the terminal devices that do not require high service delays are scheduled to the cognitive frequency band, and the terminal devices that have higher service delay requirements are required. , will be scheduled to the licensed band, priority to ensure the implementation of the business.

In the actual application scenario, the foregoing QoS levels specifically include a delay requirement, a BER (Bit Error Rate) requirement, and the like.

Based on the foregoing description, it can be seen that the specific policy of the scheduling terminal device proposed by the embodiment of the present invention includes at least the foregoing four strategies:

Strategy 1, that is, according to the selection policy of (1) in the above case 1, scheduling a preset number of terminal devices closest to the base station of the cognitive cell to work on the cognitive frequency band, and scheduling other terminal devices to be authorized. Processing strategy for working on the frequency band.

Strategy 2: According to the selection strategy of (1) in Case 2 above, the preset number of terminal devices with the largest C/I value are scheduled to work on the cognitive frequency band, and other terminal devices are scheduled to the licensed frequency band. The processing strategy of the work.

These two strategies determine the number of terminal devices that need to be scheduled to work on the cognitive band, and avoid and reduce mutual interference between the cognitive cell and the authorized cell by scheduling a specified number of terminal devices to the cognitive frequency band.

Strategy 3, that is, according to the selection strategy of (2) in Case 1 above, the distance from the base station of the cognitive cell is less than a specified distance value (ie, around the cognitive cell base station) All terminal devices within the specified range are scheduled to work on the cognitive band, and other terminal devices are scheduled to work on the licensed band.

Strategy 4: According to the selection strategy of (2) in Case 2 above, all terminal devices whose C/I value is greater than the preset C/I value are scheduled to work on the cognitive frequency band, and other terminal devices are scheduled to Processing strategy for working on licensed bands.

These two strategies determine the range of terminal devices that need to be scheduled to work on the cognitive band. All terminal devices in the range will be sent to the cognitive band to avoid and reduce the relationship between the cognitive cell and the authorized cell. Mutual interference, of course, in actual operation, there will be no case where any terminal equipment is in the corresponding range, in which case the base station of the cognitive cell abandons the use of the cognitive frequency band.

In the actual operation, the various strategies described above may be used in combination, and the change of the specific combination manner does not affect the protection scope of the present invention.

By applying the technical solution of the embodiment of the present invention, the terminal device that meets the preset rule is scheduled to work on the cognitive frequency band, and the other terminal devices are scheduled to work on the licensed frequency band, thereby effectively reducing the cognitive system and the authorization system. In the case of shared spectrum sharing, the interference between the two systems includes the interference of the authorized system on the downlink of the cognitive system, the interference of the cognitive system to the uplink of the authorized system, and at the same time, it can effectively protect the cognitive The normal and stable operation of the cognitive system of the band. Therefore, the cognitive system can use the idle spectrum resources of the authorized system without interference/low interference, improve the utilization efficiency of the spectrum, and improve the link quality.

The technical solutions proposed in the embodiments of the present invention are described below in conjunction with specific application scenarios.

First, the problems existing in the prior art are explained by specific example scenarios as follows:

Both TD-LTE and TD-SCDMA co-sites are covered by the same coverage. Both access technologies adopt multi-carrier mode. Due to the old and new network transition, TD-SCDMA has idle carrier resources, and TD-LTE is overloaded, through cognitive technology TD. -LTE can utilize the common site The idle carrier of the TD-SCDMA cell increases the capacity of the TD-LTE network, and the carrier is not in an idle state adjacent to the TD-SCDMA cell.

On the downlink side, the TD-LTE downlink operating in the TD-SCDMA idle carrier frequency band is interfered by the neighboring TD-SCDMA intra-frequency cell base station, and the adjacent TD-SCDMA cell downlink is affected by the TD-LTE base station operating in the idle frequency band. Interference, downlink interference is more serious at the cell edge; on the uplink side, the TD-LTE uplink operating in the idle frequency band is interfered by the adjacent TD-SCDMA intra-frequency cell edge terminal, and the adjacent TD-SCDMA intra-frequency cell base station is operated at Interference from TD-LTE edge terminals in idle frequency bands.

It can be seen that the existing user scheduling policies all consider the link quality and network capacity of the local cell. After the introduction of the spectrum sharing mechanism, the existing user scheduling policy does not reduce the mutual interference between the cognitive cell and the authorized cell, nor can it suppress the interference of the authorized cell to the cognitive cell.

The technical solution proposed by the embodiment of the present invention is mainly for solving the above-mentioned interference between the authorized cell and the cognitive cell to the cognitive frequency band when the spectrum sharing is implemented by the cognitive radio technology, and scheduling other terminal devices. Working on the licensed frequency band, on the one hand, to ensure the normal operation of the cognitive system in the cognitive frequency band, on the other hand, to reduce the interference between different systems due to spectrum sharing.

As shown in FIG. 4, taking the TD network as an example, if the TD-SCDMA and the TD-LTE spectrum are shared, the TD-LTE cell in the same area uses the idle carrier resource of the TD-SCDMA cell, and the two cells are considered to be the target TD-LTE. The cell and the target TD-SCDMA cell, the idle carrier resource is a cognitive frequency band, that is, the TD-LTE cell is a cognitive cell, and the TD-SCDMA cell is an authorized cell.

In this application scenario, in order to describe a specific process for applying the technical solution proposed by the embodiment of the present invention, in the following embodiments, the foregoing scenario is taken as an example, and a description of the corresponding processing process is performed. The QoS level based on the foregoing step S302 is further applied to ensure the QoS of the specific service. Step screening scheme, of course, this is only a preferred example, the specific combination of strategies, and whether to adopt further screening based on QoS levels, can be adjusted according to actual needs, such changes do not affect the scope of protection of the present invention.

As shown in FIG. 5, a schematic flowchart of an interference suppression method in a case of inter-system spectrum sharing in a specific application scenario according to an embodiment of the present invention includes the following steps:

Step S501: The JSM collects spectrum usage of TD-LTE and TD-SCDMA, and analyzes available idle spectrum resources.

If the target TD-SCDMA has an idle carrier in a certain area, and the target TD-LTE is heavily loaded in the same area, step S502 is performed.

If there is no idle carrier as described above, or if there is a line carrier, but the load of TD-LTE is not heavy, the process ends.

Step S502: The JSM analyzes whether the target TD-LTE can utilize the target TD-SCDMA idle carrier resource.

If yes, step S503 is performed;

If not, end this process.

Step S503: The base station of the TD-LTE cell determines the distance of the terminal device from the base station according to the uplink signal power of the terminal device in the connected state in the cell.

Step S504: The base station of the TD-LTE cell determines whether there is a terminal device whose distance from the base station is less than L.

This step is the process of processing using the aforementioned strategy three.

If not present, the base station of the TD-LTE cell relinquishes the idle carrier using the target TD-SCDMA;

If yes, step S505 is performed.

Step S505: The base station of the TD-LTE cell selects the S terminal devices with the largest C/I as the terminal device set that can be scheduled to the cognitive frequency band in the terminal device whose distance from the base station is less than L.

This step is the process of processing using the aforementioned strategy 2.

Step S506: The base station of the TD-LTE cell is configured according to each terminal in the terminal device set. The QoS requirements of the current service of the device are selected to be allocated to the cognitive frequency band by the terminal device with low delay requirement, and the other terminal devices are scheduled to work on the licensed frequency band.

If a new terminal device accesses the TD-LTE network, step S507 is performed. Step S507: The base station of the TD-LTE cell estimates the distance between the terminal device and the base station according to the uplink signal of the terminal device, and determines whether the determined distance is less than L.

If it is less than L, proceed to step S508;

If it is not less than L, the terminal device is scheduled to work on the licensed band.

Step S508: The base station of the TD-LTE cell determines whether the C/I of the terminal device is greater than a preset C/I threshold K.

This step is the process of processing using the aforementioned strategy four.

If it is greater than, the base station of the TD-LTE cell determines that the terminal device is a terminal device that can be scheduled to the cognitive frequency band, and continues to step S509;

If not greater, the terminal device is scheduled to work on the licensed band.

Step S509: The base station of the TD-LTE cell determines, according to the QoS requirement of the current service of the terminal device, whether the cognitive frequency band satisfies the delay requirement of the terminal device.

If the current service delay requirement of the terminal device is not high, that is, the cognitive frequency band satisfies the delay requirement of the terminal device, the terminal device is scheduled to work on the cognitive frequency band;

On the contrary, if the delay requirement of the current service of the terminal device is high, that is, the cognitive frequency band cannot meet the delay requirement of the terminal device, the terminal device is scheduled to work on the licensed frequency band.

In the foregoing process, the foregoing policy 2, policy 3, and policy 4, and the policy for further screening according to the QoS level proposed in step S302 are respectively applied. In an actual application scenario, the device may be selected according to actual needs. The specific strategy of the application, that is, the combination of other forms of strategy, does not affect the scope of protection of the present invention.

By applying the technical solution of the embodiment of the present invention, the terminal device that meets the preset rule is scheduled to work on the cognitive frequency band, and the other terminal devices are scheduled to work on the authorized frequency band. Therefore, it is possible to effectively reduce the interference between the two systems in the case where the cognitive system and the authorization system share the spectrum sharing, including the interference of the authorization system to the cognitive system downlink, and the cognitive system's uplink to the authorization system. The interference of the road, at the same time, can effectively guarantee the normal and stable work of the cognitive system in the cognitive frequency band. Therefore, the cognitive system uses the idle spectrum resources of the authorized system without interference/low interference, improves the utilization efficiency of the spectrum, and improves the link quality.

In order to implement the technical solution of the embodiment of the present invention, the embodiment of the present invention further provides a base station, which is a base station serving a cognitive cell, and the corresponding terminal device is shown in FIG.

a setting module 61, configured to set a selection condition;

The selecting module 62 is configured to select, in each terminal device served by the base station, a terminal device that meets the selection condition set by the setting module 61;

The scheduling module 63 schedules the terminal device selected by the selection module 62 to work on the cognitive frequency band, and schedules other terminal devices to work on the licensed frequency band.

Further, the base station further includes an obtaining module 64, configured to:

Obtaining path loss information of each terminal device served by the base station, and determining a distance between the base station and each terminal device according to the path loss information; and/or,

Obtaining the uplink and/or downlink C/L corresponding to each terminal device served by the base station In a specific implementation scenario, the setting module 61 is specifically configured to set a selection condition including a distance condition and/or a C/I condition.

Correspondingly, the selection module 62 is specifically used for:

According to the distance between the base station and each terminal device determined by the obtaining module 64, among the terminal devices served by the base station, the terminal device that meets the distance condition is selected as the terminal device that meets the selection condition set by the setting module 61; and Or,

According to the uplink and/or downlink C/I acquired by the obtaining module 64, among the terminal devices served by the base station, the terminal device that satisfies the C/I condition is selected as the terminal device that meets the selection condition set by the setting module 61.

Further, the selecting module 62 is specifically configured to:

According to the distance between the base station and each terminal device determined by the obtaining module 64, Among the terminal devices served by the station, the preset number of terminal devices closest to the base station are selected as the terminal devices that meet the selection conditions set by the setting module 61; and/or,

According to the distance between the base station and each terminal device determined by the obtaining module 64, among all the terminal devices served by the base station, all the terminal devices whose distance between the base station and each terminal device is less than the preset distance value are selected as the compliance setting module. 61 terminal equipment for selecting conditions;

The preset number or preset distance value is defined by the distance condition set by the setting module 61.

On the other hand, the selection module 62 is specifically used to:

According to the uplink and/or downlink C/I acquired by the obtaining module 64, among the terminal devices served by the base station, the preset number of terminal devices having the highest C/I value is selected to be set by the setting module 61. Select the condition of the terminal device; and / or,

According to the uplink and/or downlink C/I acquired by the obtaining module 64, among all the terminal devices served by the base station, all the terminal devices whose corresponding C/I values are greater than the preset C/I value are selected as the compliance setting module 61. a terminal device of the selected selection condition;

The preset number or preset C/I value is defined by the C/I condition set by the setting module 61.

In another scenario, the scheduling module 63 is further configured to discard the use of the cognitive carrier when the selection module 62 does not select at least one terminal device that meets the preset condition in each terminal device served by the base station.

It should be noted that the scheduling module 63 is further configured to determine, according to the QoS level of the service corresponding to each terminal device, whether the corresponding terminal device is determined by the terminal device that meets the selection condition set by the setting module 61 selected by the selection module 62. The scheduling requirements are met; the terminal devices that meet the scheduling requirements are scheduled to work on the cognitive frequency band, and the remaining other terminal devices are scheduled to work on the licensed frequency band.

Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments of the present invention can be implemented by hardware or by means of software plus a necessary general hardware platform. Based on the understanding, the technical solution of the embodiment of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.). A number of instructions are included to cause a computer device (which may be a personal computer, a server, or a network side device, etc.) to perform the methods described in various implementation scenarios of embodiments of the present invention.

A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred implementation scenario, and the modules or processes in the drawings are not necessarily required to implement the embodiments of the present invention.

A person skilled in the art may understand that the modules in the apparatus in the implementation scenario may be distributed in the apparatus for implementing the scenario according to the implementation scenario description, or may be correspondingly changed in one or more devices different from the implementation scenario. The modules of the above implementation scenarios may be combined into one module, or may be further split into multiple sub-modules.

The serial numbers of the foregoing embodiments of the present invention are merely for description, and do not represent the advantages and disadvantages of the implementation scenarios. The embodiment is not limited thereto, and any changes that can be made by those skilled in the art should fall within the scope of the business limitation of the embodiment of the present invention.

Claims

Rights request

A method for suppressing interference in the case of spectrum sharing between different systems, characterized in that it comprises at least the following steps:

The method according to claim 1, wherein before the selecting, by the base station of the cognitive cell, the terminal device that meets the preset condition,

The base station of the cognitive cell acquires path loss information of each terminal device served by the base station, and determines a distance between itself and each terminal device according to the path loss information; and/or, the base station of the cognitive cell Obtain the uplink and/or downlink carrier-to-interference ratio C/I corresponding to each terminal device served by itself.

The method according to claim 2, wherein the base station of the cognitive cell selects a terminal device that meets a preset condition among the terminal devices served by the cognitive cell, specifically:

The base station of the cognitive cell selects, according to the determined distance between itself and each terminal device, the terminal device that meets the distance condition as the terminal device that meets the preset condition in each terminal device served by the base station; and/or ,

The base station of the cognitive cell selects, according to the obtained uplink and/or downlink C/I, the terminal device that meets the C/I condition as the terminal device that meets the preset condition in each terminal device served by the base station.

4. The method of claim 3, wherein

The base station of the cognitive cell selects the terminal device that meets the distance condition as the terminal device that meets the preset condition, according to the determined distance between itself and each terminal device, in each terminal device that is served by itself, specifically:

The base station of the cognitive cell according to the determined distance between itself and each terminal device The terminal device that is the closest to the base station of the cognitive cell is the terminal device that meets the preset condition; and/or the base station of the cognitive cell is based on Determining the distance between itself and each terminal device, and selecting the distance between itself and each terminal device in the terminal devices served by the terminal device is smaller than a preset value, and the base station of the cognitive cell according to the acquired uplink And the downlink C/I, the terminal device that meets the C/I condition is selected as the terminal device that meets the preset condition, and includes:

The base station of the cognitive cell selects, according to the obtained uplink and/or downlink C/I, the preset number of terminal devices with the highest C/I value corresponding to the preset among the terminal devices served by the base station. And the base station of the cognitive cell selects the pair of devices in the terminal devices served by the base station according to the acquired uplink and/or downlink C/I. , , , , ,

The method according to claim 1, wherein the base station of the cognitive cell selects the terminal device that meets the preset condition among the terminal devices that are served by the cognitive cell, and further includes:

If the base station of the cognitive cell does not select at least one terminal device that meets the preset condition among the terminal devices served by itself, the base station of the cognitive cell abandons the use of the cognitive carrier.

The method according to claim 1, wherein the base station of the cognitive cell schedules the terminal device that meets the preset condition to work in the cognitive frequency band, and further includes:

The base station of the cognitive cell determines whether the corresponding terminal device meets the scheduling requirement according to the quality of service QoS level of the service corresponding to each terminal device in the terminal device that meets the preset condition;

The base station of the cognitive cell schedules the terminal device that meets the scheduling requirement to work on the cognitive frequency band, and schedules the remaining other terminal devices to work on the licensed frequency band.

7. A base station, which serves as a base station serving a cognitive cell, and a corresponding terminal device The question is, at least:

a setting module for setting a selection condition;

a selection module, configured to select, in each terminal device served by the base station, a terminal device that meets a selection condition set by the setting module;

The base station according to claim 7, further comprising: an acquiring module, configured to:

Obtaining uplink and/or downlink C/I corresponding to each terminal device served by the base station.

9. The base station according to claim 8, wherein:

The setting module is specifically configured to set a selection condition including a distance condition and/or a C/I condition;

The selection module is specifically configured to:

Determining, according to the distance between the base station and each terminal device determined by the acquiring module, a terminal device that meets the distance condition in each terminal device served by the base station to be configured according to the setting module Select the condition of the terminal device; and / or,

Selecting, according to the uplink and/or downlink C/I acquired by the acquiring module, among the terminal devices served by the base station, selecting a terminal device that meets the C/I condition to meet the setting set by the setting module. Conditional terminal equipment.

The base station according to claim 9, wherein the selection module is specifically configured to:

Determining, according to the distance between the base station and each terminal device determined by the acquiring module, a preset number of terminal devices closest to the base station in each terminal device served by the base station to meet the setting a terminal device that selects a condition set by the module; and/or, according to the distance between the base station and each terminal device determined by the acquiring module, selects the base station among each terminal device served by the base station All terminal devices having a distance from each terminal device that is less than a preset distance value are set according to the setting module. Terminal equipment for selecting conditions;

The preset number or the preset distance value is defined by a distance condition set by the setting module;

Or the selection module is specifically configured to:

Selecting, according to the uplink and/or downlink C/I acquired by the acquiring module, a preset number of terminal devices with the highest C/I value corresponding to the setting in each terminal device served by the base station a terminal device that selects a condition set by the module; and/or, according to the uplink and/or downlink C/I acquired by the acquiring module, selects a corresponding C/I among each terminal device served by the base station All terminal devices whose value is greater than the preset C/I value are terminal devices that meet the selection conditions set by the setting module;

The preset number or the preset C/I value is defined by a C/I condition set by the setting module.

The base station according to claim 7, wherein the scheduling module is further configured to:

When the selection module does not select at least one terminal device that meets the preset condition in each terminal device served by the base station, the cognitive carrier is discarded.

Determining, by the selection module, the terminal device that meets the selection condition set by the setting module, whether the corresponding terminal device meets the scheduling requirement according to the QoS level of the service corresponding to each terminal device;

The terminal device that satisfies the scheduling requirement is scheduled to work on the cognitive frequency band, and the remaining other terminal devices are scheduled to work on the licensed frequency band.